idioms involving “up”

Upscale

Expensive, high quality

“There are several restaurants nearby but they are a bit upscale for most college students.”

On the up-and-up

Legal, respectable

“His company is growing rapidly, though some wonder if everything is on the up-and-up.”

Up-and-coming

Gaining prominence, likely to succeed

“Kato-san was named the up-and-coming designer at the Milan fashion show.”

Stuck-up

Aloof, snobbish

“The secretary isn't stuck-up; she is just shy around new people.”

Uptight

Nervous, uneasy, tense

“Why is Takashi-san so uptight about making her presentation? She always does a wonderful job.”